From 9e2a28ea54107e0f9c91ae3094974a310d0da027 Mon Sep 17 00:00:00 2001
From: Nadeem Vawda <nadeem.vawda@gmail.com>
Date: Sun, 30 Sep 2012 13:41:29 +0200
Subject: [PATCH] Fix the return value of BZ2File._read_block() to be
 consistent with comments.

---
 Lib/bz2.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/bz2.py b/Lib/bz2.py
index 61d989bcace..fe4118f9a7a 100644
--- a/Lib/bz2.py
+++ b/Lib/bz2.py
@@ -226,7 +226,7 @@ class BZ2File(io.BufferedIOBase):
             data = self._buffer[self._buffer_offset : end]
             self._buffer_offset = end
             self._pos += len(data)
-            return data
+            return data if return_data else None
 
         # The loop assumes that _buffer_offset is 0. Ensure that this is true.
         self._buffer = self._buffer[self._buffer_offset:]